https://theconversation.com/que-trama-putin-en-africa-213335
https://www.bruegel.org/2022/02/preparing-for-the-first-winter-without-russian-gas/
https://larouchepub.com/eiw/public/2014/eirv41n08-20140221/34-35_4108.pdf
https://www.brookings.edu/wp-content/uploads/2020/11/Future-U.S.-policy-toward-China-v8.pdf